paomadeng.c

用单片机控制的跑马灯程序。 定时器控制刷新的时间。

#include <regx51.h>
//#define TIMER0_COUNT=0xEE11;
unsigned char timer0_tick,i=0;
const p11[10]={11110000,00001111,11001100,10010011,11001111,00001100,01010101,10101010,00110011,010101010};

static void timer0_isr(void) interrupt TF0_VECTOR using 1
{TR0=0;
 TL0=(0xEE11 & 0x00FF);
 TH0=(0xEE11>>8);
 TR0=1;
 timer0_tick++;
 if (timer0_tick==200)
    {i++;
	 if(i==10)
	   i=0;
	   timer0_tick=0;
	   P1=p11[i];
	}
 }

static void timer0_initialize(void)
{EA=0;
 timer0_tick=0;
 TR0=0;
 TMOD=0x01;
 TL0=(0xEE11 & 0x00FF);
 TH0=(0xEE11>>8);
 PT0=0;
 ET0=1;
 TR0=1;
 EA=1;
 }

void main (void)
{timer0_initialize();
 while(1);
}

/*void main (void)
{unsigned char j=0xFE;
 j=(j<<1)|0x01;
 if(j==0xFF);
 j=0xFE;
 P1=j;
 delay();
}*/